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Research Article

Measuring the Meltdown: Drivers of Global Amphibian Extinction and Decline

  • Navjot S. Sodhi mail,

    *E-mail: dbsns@nus.edu.sg (NSS); dbsbdp@nus.edu.sg (DB)

    Affiliation: Department of Biological Sciences, National University of Singapore, Singapore, Singapore

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  • David Bickford mail,

    *E-mail: dbsns@nus.edu.sg (NSS); dbsbdp@nus.edu.sg (DB)

    Affiliation: Department of Biological Sciences, National University of Singapore, Singapore, Singapore

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  • Arvin C. Diesmos,

    Affiliations: Department of Biological Sciences, National University of Singapore, Singapore, Singapore, Herpetology Section, Zoology Division, National Museum of the Philippines, Manila, Philippines

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  • Tien Ming Lee,

    Affiliation: Ecology, Behavior and Evolution Section, Division of Biological Sciences, University of California San Diego, La Jolla, California, United States of America

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  • Lian Pin Koh,

    Affiliation: Department of Ecology and Evolutionary Biology, Princeton University, Princeton, New Jersey, United States of America

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  • Barry W. Brook,

    Affiliation: Research Institute for Climate Change and Sustainability, School of Earth and Environmental Sciences, University of Adelaide, Adelaide, South Australia, Australia

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  • Cagan H. Sekercioglu,

    Affiliation: Department of Biological Sciences, Stanford University, Stanford, California, United States of America

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  • Corey J. A. Bradshaw

    Affiliations: Research Institute for Climate Change and Sustainability, School of Earth and Environmental Sciences, University of Adelaide, Adelaide, South Australia, Australia, School for Environmental Research, Institute of Advanced Studies, Charles Darwin University, Darwin, Northern Territory, Australia

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  • Published: February 20, 2008
  • DOI: 10.1371/journal.pone.0001636

Reader Comments (8)

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why?

Posted by mmccallum on 19 Nov 2012 at 14:15 GMT

Annual temperature seasonality and annual precipitation seasonality were calculated as the square root of the difference between mean annual maximum and minimum values.
http://plosone.org/article/info:doi/10.1371/journal.pone.0001636#article1.body1.sec4.p1

why not just use the actual values for the different seasons? McCallums two papers in combinations with studies cited within demonstrate that annual variation is pretty much no useful, you must examine each season because small variations in some seasons (T & P in winter) can be much more important than the same variations in summer for example.

No competing interests declared.